Using a needle made of bone in Stone Age times. The woman is sewing two pieces of animal hide together for clothingWe use tools and machines to make our lives easier in some way. Using knowledge to create these tools and machines is called technology. Simple technology, dating back many thousands of years, enabled human beings to make fire, hunt animals and build shelters. Modern technology allows us to do an amazing range of things, such as communicating with people all over the world, building powerful engines and making major advances in medicine.
Machines are designed to perform tasks that we would find difficult or impossible to do without them. A saw is a simple machine. It is easy to cut through wood using a saw, but it is impossible to do so with your bare hands.
A computer is a much more complicated machine. It can do calculations that would take you a very long time in a fraction of a second.
Using a mechanical saw. Powered by a motor, a mechanical saw cuts through wood much more easily than by using a hand-held saw.
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